The Dell S2421H/S2721H monitor has an active matrix, Thin Film Transistor (TFT),
Liquid Crystal Display (LCD), and LED backlight. The monitor features include:
• S2421H: 60.45 cm (23.8 in.) active area display (Measured diagonally) 1920 x
1080 (16:9) resolution, plus full-screen support for lower resolutions.
• S2721H: 68.6 cm (27 in.) active area display (Measured diagonally) 1920 x 1080
(16:9) resolution, plus full-screen support for lower resolutions.
• Tilt adjustment capability.
• Removable pedestal and Video Electronics Standards Association (VESA™) 100
mm mounting holes for flexible mounting solutions.
• Ultra-thin bezel minimizes the bezel gap in multi-monitor usage, enabling easier
set up with an elegant viewing experience.
• Extensive digital connectivity with HDMI helps future-proof your monitor.
• Plug and play capability if supported by your system.
• On-Screen Display (OSD) adjustments for ease of set-up and screen
optimization.
• Supports AMD FreeSync™ technology, AMD Freesync™ certified range from
48HZ -75HZ.
• Power and OSD buttons lock.
• Security lock slot.
• 0.3 W standby power when in the standby mode.
• Optimize eye comfort with a flicker-free screen.
WARNING: The possible long-term effects of blue light emission from the
monitor may cause damage to the eyes, including eye fatigue or digital eye
strain. ComfortView feature is designed to reduce the amount of blue light
emitted from the monitor to optimize eye comfort.
About your monitor | 7
Identifying parts and controls
Front view
12
LabelDescriptionUse
1Function buttons For more information, see Operating the Monitor
2Power on/off button
(with LED indicator)
To turn the monitor on or off.
8 | About your monitor
Back view
1
2
3
4
DELL S2421HN
Flat Panel Monitor / 液晶显示器
型号 : S2421HN
Input Rating / 输入电源 :
100-240V ~ 50/60Hz 1.5A
Made in China / 制造地:中国
Manufactured date / 制造日期:
DELL S2421HN
Flat Panel Monitor / Monitor Plano Panel / Monite ur à écran plat / 液晶顯 示器
Model No. / N° de Modelo / Numéro de modèle /型號: S2421Ht
Input Rating / Entrada / Daya Tegangan / Tension d’entrée : 100-240V ~ 50/60Hz 1.5A
輸入電源:交流電壓 100-240伏特, 1.5安培, 50/60赫茲
Made in China / Fabricado en China / Fabriqué en Chine / СделановКитае / 製造地:中國
Consumo de energía en operación: XX.XX Wh
2
Удельная мощность рабочего режима -X,XXX Вт/см
Потребляемая мощность изделием в режиме ожидания -X,XX Вт
Потребляемая мощность изделием в выключенном режиме - X,XX Вт
Apparatet må tilkoples jordet stikkontakt.
Apparaten skall anslutas till jordat uttag.
Apparatets stikprop skal tilsluttes en stikkontakt med jord,
som giver forbindelse til stikproppens jord.
Laite on liitettävä suojakoskettimilla varustettuun pistorasiaan.
For UK only: Cain Road, Bracknell, RG12 1LF
This device complies with part 15 of the FCC Rules.
XXXXXXXXXX
ID
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received,
XXXXXXXX-XXXXX
including interference that may cause undesired operation.
R-R-WT1-S2421Ht
E
t
IS 13252 (Part 1)/
IEC 60950-1
XXXXXX-XX
R-41071650
www.bis.gov.in
ID XXXXXXXXXX
Address for EU Only:
Raheen Business Park
Limerick Ireland
www.dell.com/regulatory_compliance
И005-20
XXXXX
Flat Panel Monitor / 液晶显示器
DELL S2421HN
型号 : S2421HN
Input Rating / 输入电源 :
100-240V ~ 50/60Hz 1.5A
Made in China / 制造地:中国
E
Manufactured date / 制造日期:
t
Label DescriptionUse
1VESA mounting holes (100 mm x
100 mm-behind attached VESA
cover)
Wall mount monitor using VESAcompatible wall mount kit (100 mm x
100 mm).
2Regulatory labelLists the regulatory approvals.
3Stand release buttonReleases stand from monitor.
4Barcode, serial number, and Service
Tag label
Refer to this label if you need to contact
Dell for technical support. The Service
Tag is a unique alphanumeric identifier
that enables Dell service technicians
to identify the hardware components
in your display and access warranty
information.
5Cable management slotUse to organize cables by placing them
through the slot.
5
About your monitor | 9
Bottom view
324 5 6
71
Label DescriptionUse
1Built-in right speakerProvides audio output.
2Security lock slotSecures monitor with security cable lock
(sold separately).
3Power connectorConnect the power cable (shipped with your
monitor).
4HDMI port 1Connect your computer with HDMI cable.
5HDMI port 2Connect your computer with HDMI cable.
6Audio line-out portConnect speakers to playback audio through
HDMI audio channel.
Only two-channel audio is supported.
NOTE: The audio line-out port does not support
headphones.
7Built-in left speakerProvides audio output.
10 | About your monitor
Monitor specifications
ModelS2421HS2721H
Screen typeActive matrix - TFT LCD
Panel TypeIn-plane switching Technology
Aspect ratio16:9
Viewable image dimensions
Diagonal60.45 cm (23.8 in.)68.6 cm (27 in.)
Active Area
Horizontal527.04 mm (20.75 in.)597.89 mm (23.54 in.)
Vertical296.46 mm (11.67 in.)336.31 mm (13.24 in.)
2
Area156246.28 mm
Pixel pitch0.2745 mm x 0.2745 mm0.3114 mm x 0.3114 mm
Pixel per inch (PPI)92.5681.59
Viewing angle
Horizontal178° (typical)
Vertical178° (typical)
Brightness250 cd/m² (typical)300 cd/m² (typical)
Contrast ratio1000 to 1 (typical)
Display screen coating Anti-glare treatment of the front polarizer (3H) hard coating
BacklightLED edgelight system
Response Time (Gray
to Gray)
8 ms (normal)
5 ms (fast)
4 ms (extreme)
Color depth16.7 million colors
Color gamut*NTSC 72%
Connectivity•2 x HDMI1.4
•1 x Audio line out (3.5 mm jack)
Border width (edge of monitor to active area)
Top/Left/Right5.4 mm 6.0 mm
Bottom20.7 mm21.3 mm
Adjustability
Height adjustable
NA
stand
Tilt-5° to 21°
SwivelNA
PivotNA
(242.15 in.2) 201073.02 mm2 (311.67 in.2)
About your monitor | 11
Cable managementYes
(Hz)
VESA, 1280 x 1024
80.0
75.0
135.0
+/+
Dell Display Manager
(DDM)Compatibility
Security Security lock slot (cable lock sold separately)
* At panel native resolution only, under Custom Mode preset.
Resolution specifications
ModelS2421H/S2721H
Horizontal scan range30 kHz to 83 kHz
Vertical scan range48 Hz to 75 Hz
Maximum preset resolution1920 x 1080 at 60 Hz
Video display capabilities
(HDMI playback)
Preset display modes
S2421H/S2721H
Easy Arrange and other key features
480i, 480p, 576i, 576p, 720p, 1080i, 1080p
Display ModeHorizontal
Frequency
(kHz)
VGA, 720 x 400 31.5 70.028.3- /+
VGA, 640 x 480 31.5 60.0 25.2 -/VESA, 640 x 48037.575.031.5-/VESA, 800 x 600 37.960.040.0+/+
VESA, 800 x 600 46.975.049.5+/+
VESA, 1024 x 768 48.460.065.0 - /VESA, 1024 x 768 60.075.0 78.8 +/+
MAC, 1152 x 864 6 7.575.0108.0+/+
VESA, 1280 x 1024 64.060.0108.0+/+
VESA, 1600 x 900 60.060.0108.0+/+
CVT, 1920 x 108067.560.0148.5+/+
CVT, 1920 x 108083.8975.0174.5+/-
Vertical
Frequency
Pixel Clock
(MHz)
Sync Polarity
(Horizontal/
Vertical)
12 | About your monitor
Electrical specifications
ModelS2421H/S2721H
Video input signals•Digital video signal for each dierential line
Per dierential line at 100 ohm impedance
•HDMI signal input support
Input voltage/ frequency/
current
Inrush current 120 V: 30 A (maximum)
Speaker specifications
ModelS2421H/S2721H
Speaker rated power2 x 3W
Frequency response315 Hz - 12.5 kHz
Impedance4 ohm
Physical characteristics
100-240 VAC / 50 or 60 Hz ± 3 Hz / 1.5 A
(maximum)
240 V: 60 A (maximum)
Model
Connector type•2 x HDMI1.4 ports
Signal cable type1.8 m HDMI1.4 cable
Dimensions (with stand)
Height
Width
Depth
Dimensions (without stand)
Height
Width
Depth
Stand dimensions
Height
Width
Depth
S2421HS2721H
•1 x Audio line-out port
412.8 mm (16.25 in.)453.3 mm (17.85 in.)
537.8 mm (21.17 in.)609.9 mm (24.01 in.)
152.8 mm (6.02 in.)186.8 mm (7.35 in.)
322.6 mm (12.70 in.)363.6 mm (14.32 in.)
537.8 mm (21.17 in.)609.9 mm (24.01 in.)
53.8 mm (2.12 in.)54.0 mm (2.13 in.)
171.6 mm (6.76 in.)176.0 mm (6.93 in.)
249.0 mm (9.80 in.)257.2 mm (10.13 in.)
152.8 mm (6.02 in.)186.8 mm (7.35 in.)
About your monitor | 13
Weight
Weight with packaging6.0 kg (13.23 lb.)7.7 kg (16.98 lb.)
Weight with stand assembly
and cables
Weight without stand
assembly (For wall mount or
VESA mount considerations
- no cables)
Weight of stand assembly0.5 kg (1.1 lb.)0.7 kg (1.54 lb.)
•Arsenic-Free glass and Mercury-Free for the panel only.
Temperature
Operating0°C to 40°C (32°F to 104°F)
Non-operating–20°C to 60°C (–4°F to 140°F)
Humidity
Operating10% to 80% (non-condensing)
Non-operating5% to 90% (non-condensing)
Altitude
Operating (maximum)5,000 m (16,404 ft)
Non-operating (maximum)12,192 m (40,000 ft)
Thermal dissipation
S2421H102.36 BTU/hour (maximum)
S2721H139.90 BTU/hour (maximum)
4.2 kg (9.26 lb.)5.4 kg (11.9 lb.)
3.4 kg (7.5 lb.)4.4 kg (9.7 lb.)
68.24 BTU/hour (typical)
71.65 BTU/hour (typical)
14 | About your monitor
Power management modes
If you have VESA’s DPM-compliant video card or software installed in your PC, the
monitor can automatically reduce its power consumption when not in use. This is
referred to as standby mode*. If the computer detects input from the keyboard,
mouse, or other input devices, the monitor automatically resumes functioning. The
following table shows the power consumption and signaling of this automatic power
saving feature.
S2421H
VESA
Modes
Normal
Horizontal
Sync
Vertical
Sync
Video Power Indicator Power
ActiveActiveActive White30 W (maximum)**
operation
Active-
InactiveInactiveOffWhite
off mode
Switch
---OffLess than 0.3 W
off
Power Consumption P
on
11.81 W
Total Energy Consumption (TEC) 37.52 kWh
S2721H
VESA
Modes
Normal
Horizontal
Sync
Vertical
Sync
Video Power Indicator Power
ActiveActiveActive White41 W (maximum)**
operation
Active-
InactiveInactiveOffWhite
off mode
Switch
---OffLess than 0.3 W
off
Power Consumption P
on
14.64 W
Total Energy Consumption (TEC) 46.14 kWh
Consumption
20 W (typical)
Less than 0.3 W
(Glowing)
Consumption
21 W (typical)
Less than 0.3 W
(Glowing)
About your monitor | 15
The OSD operates only in the normal operation mode. If you press any button in the
active-off mode, the following message is displayed:
Dell 24/27 Monitor
No HDMI1 signal from your device.
Press any key on the keyboard or move the mouse to wake it up.
If there is no display, press the monitor button again to select
the correct input source.
S2421H/S2721H
*Zero power consumption in OFF mode can only be achieved by disconnecting the AC
mains cable from the monitor.
**Maximum power consumption with maximum luminance.
This document is informational only and reflects laboratory performance. Your product
may perform differently, depending on the software, components and peripherals
you ordered and shall have no obligation to update such information. Accordingly, the
customer should not rely upon this information in making decisions about electrical
tolerances or otherwise. No warranty as to accuracy or completeness is expressed or
implied.
Activate the computer and the monitor to gain access to the OSD.
NOTE: This monitor is ENERGY STAR certified.
This product qualifies for ENERGY STAR in the factory default settings which can
be restored by “Factory Reset” function in the OSD menu. Changing the factory
default settings or enabling other features may increase power consumption that
could exceed the ENERGY STAR specified limit.
NOTE:
Pon: Power consumption of On Mode as defined in Energy Star 8.0 version.
TEC: Total energy consumption in kWh as defined in Energy Star 8.0 version.
16 | About your monitor
Pin assignments
HDMI port
Pin number19-pin side of theconnected signal cable
1TMDS DATA 2+
2TMDS DATA 2 SHIELD
3TMDS DATA 2-
4TMDS DATA 1+
5TMDS DATA 1 SHIELD
6TMDS DATA 1-
7TMDS DATA 0+
8TMDS DATA 0 SHIELD
9TMDS DATA 0-
10TMDS CLOCK+
11TMDS CLOCK SHIELD
12TMDS CLOCK-
13CEC
14Reserved (N.C. on device)
15DDC CLOCK (SCL)
16DDC DATA (SDA)
17DDC/CEC Ground
18+5 V POWER
19HOT PLUG DETECT
About your monitor | 17
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